According to Official Guinness Records,
The fastest recorded lacrosse shot is 192.96 km/h (119.9 mph) by Patrick Luehrsen (USA) at the Libertyville Sports Complex in Libertyville, Illinois, USA, on 29 September, 2015. In addition to his accomplishment of breaking the lacrosse shot speed record, Luehrsen has also invented a flexible and durable lacrosse stick called "The Ghost."
For a complete list of 2015 records, please visit 2015 Guinness Records in United States.